What question did this study set out to answer?

To evaluate the mechanical and contractile responses of intact canine iliac artery smooth muscle activated with norepinephrine across various inflation and testing methods.

February 1, 1976American Journal of Physiology-Legacy Content

Mechanics of canine iliac artery smooth muscle in vitro

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RCR. H. CoxTexas Tech University

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Implication

In vitro experimental study demonstrates consistent contractile stress responses across inflation methods in canine iliac arteries, indicating slow inflation reliably measures smooth muscle mechanics.

Key Points

To evaluate the mechanical and contractile responses of intact canine iliac artery smooth muscle activated with norepinephrine across various inflation and testing methods.
Continuously measured transmural pressure and external diameter from intact canine iliac artery segments in vitro.
Assessed maximal smooth muscle activation by norepinephrine using step inflations, slow continuous inflations (<1 mmHg/s and 0.2 mmHg/s), and direct isometric and isobaric responses.
Active wall stress and diameter responses to norepinephrine did not differ significantly between direct isometric/isobaric methods and slow continuous inflation (<1 mmHg/s).
Pressure-diameter and stress-strain curves obtained using continuous inflation (0.2 mmHg/s) were not significantly different from step inflations, deviating from standard viscoelastic behavior.
Activation of iliac artery smooth muscle at extended contractile element lengths exceeding optimal length did not attenuate constriction responses.

Cite This Study

R. H. Cox (1976) studied this question.

synapsesocial.com/papers/6a70d356f44fa9f079de89bf https://doi.org/10.1152/ajplegacy.1976.230.2.462

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Mechanics of canine iliac artery smooth muscle in vitro

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Implication

Key Points

Cite This Study

Mechanics of canine iliac artery smooth muscle in vitro

Discussion

Member takes

Implication

Key Points

Cite This Study

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